Flying with blue screen

http://www.youtube.com/watch?v=-6_tVKUJVhQ
Ok, in this test, I used the blue screen technology, then I tracked the camera to match the perspective. It took me a long time to finish the CGI city. I created the city in After Effects with some stock around a real building. And anyway sorry about my English.
All done in After effect and Photoshop.
Shot with Canon PowerShot A75.
NguyenHoangKhoi 2010 :) :)